build(deps): bump prost from 0.12.3 to 0.12.4 (#321)

Bumps [prost](https://github.com/tokio-rs/prost) from 0.12.3 to 0.12.4.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](tokio-rs/prost@v0.12.3...v0.12.4)

---
updated-dependencies:
- dependency-name: prost
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -384,9 +384,9 @@ dependencies = [
 
 [[package]]
 name = "prost"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "146c289cda302b98a28d40c8b3b90498d6e526dd24ac2ecea73e4e491685b94a"
+checksum = "d0f5d036824e4761737860779c906171497f6d55681139d8312388f8fe398922"
 dependencies = [
  "bytes",
  "prost-derive",
@@ -416,9 +416,9 @@ dependencies = [
 
 [[package]]
 name = "prost-derive"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efb6c9a1dd1def8e2124d17e83a20af56f1570d6c2d2bd9e266ccb768df3840e"
+checksum = "19de2de2a00075bf566bee3bd4db014b11587e84184d3f7a791bc17f1a8e9e48"
 dependencies = [
  "anyhow",
  "itertools",